Imaging technology

About: Imaging technology is a research topic. Over the lifetime, 1450 publications have been published within this topic receiving 26186 citations.

First results with real-time selenium-based full-field digital mammography three-dimensional imaging system

Abstract: Our goal in this paper is to evaluate the capability of real-time selenium-technology-based full-field digital mammography (FFDM) system in breast tomosynthesis. The objective of this study is to find out the present status of amorphous selenium technology in the sense of advanced applications in clinical use. We were using tuned aperture computed tomography (TACT+) 3-dimensional (3D) technology for reconstruction. Under evaluation were amorphous selenium signal-to-noise-ratio, flat panel image artefacts and acquisition time to perform full-field digital mammography 3D examination. To be able to validate the system we used a special breast phantom. We found out that 3D imaging technology provides diagnostic value and benefits over 2-dimensional (2D) imaging. 3D TACT advantages are to define if mammography finding is caused by a real abnormal lesion or by superposition of normal parenchymal structures, to be able to diagnose and analyze the findings properly, to detect changes in breast tissue which would otherwise be missed, to verify the possible multifocality of the breast cancers, to verify the correct target for biopsies and to reduce number of biopsies performed. Slice visualization and 3D volume model provide greater diagnostic information compared to 2D projection screening and diagnostic imaging.

High-resolution crosswell seismic imaging in JiangSu Oilfield, China

Abstract: Summary TomoSeis’ unique crosswell imaging technology can solve reservoir structure and properties with unprecedented details. Today, even the state-of-art 3-D surface seismic imaging is limited by the lack of data on a scale that matches borehole measurements. The use of crosswell seismic imaging technology can directly fill the information gap between surface seismic and well logs, providing detailed information throughout the reservoir volume, and in new horizons above and below existing productive zones. Development challenges such as subseismic faults, channels, reefs or flow barriers can be identified and located, allowing reservoir development programs to be optimized at reduced cost. TomoSeis’ crosswell seismic imaging takes the seismic survey down into the reservoir itself, eliminating surface effects. Bandwidth and resolution are increased up to 100 times, and measurements are directly referenced in depth. Major new developments in imaging and acquisition technology take crosswell seismic imaging to a new level of global applications. JiangSu Oilfield organized this project to get direct experience of crosswell seismic technology in their own oilfield environments and to obtain high resolution imaging in the very complex reservoirs, which are unique to JiangSu Oilfield. Two profiles were collected in Huang Jue field. The results of these surveys have produced higher resolution images of the complex structural geology between the wells. The results agree generally with surface seismic, but yield images of much higher resolution. The imaging results show the complex reservoir structure in high-resolution, including several faults between the survey wells. Overall, reflection imaging has been most successful at imaging the complex structure, and this is recommended as the primary high-resolution imaging method in this area.

Diagnostic imaging in 2001 - a health economics perspective.

Abstract: Factors contributing to the growth and diffusion of new imaging technologies are discussed. The benefits derived from implementing and using new technologies are carefully evaluated against the associated costs to both patients and service providers. The need to invest in early scientific assessment of a new imaging technology in order to prevent wasted aquisition and utilisation later on is highlighted. Such assessment might involve evaluating the ability of the technology to improve diagnosis, positively impact on treatment plans and, above all, improve health.

Non-vision-field imaging technology based on single-photon detector

Abstract: The invention provides a non-vision-field imaging technology based on a single-photon detector. The technology includes the main contents of forward and reverse light transmitting, non-vision-field imaging boundary, and non-vision-field imaging by means of the single-photon detector, and mainly includes the steps of giving the total radiation flux when light is reflected out of the surface of a material, directly imaging a visible light material panel by detecting pixels, vectorizing imaging models according to the alphabet sequencing mode to express indirect illumination components and conduct solving through the iterative least square method, recording the behaviors of a photon through the single-photon avalanche diode detector, recording the incidence time of a photon stream by means ofa determined time window, expressing the probability of detecting a certain number of photon behaviors through poisson distribution, and describing the problem into a maximum likelihood estimation problem and conducting solving. A non-vision-field imaging nonlinear model and a dual-convex solving method are put forward on the basis of the single-photon detector, and the technology has the advantages of being better in algorithm performance and more robust in system.